Re: [time-nuts] new clock

2014-07-23 Thread Alexander Pummer
it does need a different design, but a buried oscillator, 5 to 8 meter deep in the garden has the best temperature stabilization, just don't turn thee power off, but that could be done using the old Greek water-clock principle, the spill over stabilizer. In the Bay Area [California] the soil's

Re: [time-nuts] new clock

2014-07-23 Thread Neville Michie
Deep soil temperature stability is a bit of a myth, mainly because not many people actually measure it. I measured a beautiful 0.2C degree annual sine wave 15 metres down in limestone in Kentucky. The catch is the Gauss's Error function drop-off rate of temperature fluctuation is a very good

[time-nuts] new clock

2014-07-22 Thread Richard Warner
Greetings, Started following the discussions recently and am learning a lot. Found the temperature sensor thread interesting. Measuring contact temperature (enclosure, heat sink) is a different problem than air temperature. For closing temperature control loops the absolute accuracy is

[time-nuts] new clock

2014-07-22 Thread Mark Sims
An oscillator can take many weeks to settle in after being powered off / shipped / abused / looked at cross-eyed / etc. It typically takes a Thunderbolt a month or two to settle down after being shipped from China.

Re: [time-nuts] new clock

2014-07-22 Thread paul swed
Agree with Marks comments. Regards Paul On Tue, Jul 22, 2014 at 5:25 PM, Mark Sims hol...@hotmail.com wrote: An oscillator can take many weeks to settle in after being powered off / shipped / abused / looked at cross-eyed / etc. It typically takes a Thunderbolt a month or two to settle

Re: [time-nuts] new clock

2014-07-22 Thread Bob Camp
Hi A lot depends on the oscillator. My fine old GR rack mount took most of 9 months to settle most of the way. It was still dropping in a year after that when I stopped watching it. Some of my T-Bolts took a week, some took a couple months…. Best thing you can do with any OCXO is just leave

Re: [time-nuts] New clock

2011-01-19 Thread lstoskopf
Have an extra $1,500? http://www.symmetricom.com/products/frequency-references/chip-scale-atomic-clock-csac/SA.45s-CSAC/ N0UU ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] New clock

2011-01-19 Thread Rex
On 1/19/2011 11:39 AM, lstosk...@cox.net wrote: Have an extra $1,500? http://www.symmetricom.com/products/frequency-references/chip-scale-atomic-clock-csac/SA.45s-CSAC/ N0UU Did you miss the many earlier messages on this list? They actually had a PR blurb about this on the local TV news

Re: [time-nuts] New clock

2011-01-19 Thread jimlux
On 1/19/11 2:18 PM, Rex wrote: On 1/19/2011 11:39 AM, lstosk...@cox.net wrote: Have an extra $1,500? http://www.symmetricom.com/products/frequency-references/chip-scale-atomic-clock-csac/SA.45s-CSAC/ N0UU Did you miss the many earlier messages on this list? They actually had a PR blurb

Re: [time-nuts] New clock

2011-01-19 Thread WB6BNQ
jimlux wrote: Mind you, this is in California, where we pronounce cot and caught exactly the same way. Jim, You must be hanging out in the streets again. You need to stop that. BillWB6BNQ ___ time-nuts mailing list -- time-nuts@febo.com To